Clamping member.



No. 642,983.,V

\ Patented- Feb. 6, |900. G. W. KRTRIGHT.

CLMPING MEMBER.

(Application led Nov. 15, 1898.\

@No Model.)

WVM/moge@ GEORGE W. KORTRIGHT, OF SIOUX CITY, IOWA.

CLAIVI PING MEMBER.

SPECIFICATION forming part of Letters Patent No. 642,988, dated February 6, 1900.

Application filed November 15, 1898. Serial No. 696,525. (No model.)

T0 all whom it may concern.;

Beit known that I, GEORGE W. KORTRIGHT, a citizen of the United States,residing at Sioux City, in the county of Woodbury and State of Iowa, have invented certain new and usefullmprovements in Clamping Members; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to new and useful improvements in clamping members, andespecially to expanding telescopic clam ps adapted for use in securely holding tubings in a iixed position, for use particularly in connection with saddle-posts and steering-heads of bicycles.

More specilically, the present invention resides in the provision of an expanding clamping-cylinder which is longitudinally slitted and provided with a flange at one end, which ilange is fitted into a recessed or collared portion ofa tightening-nut and having a swiveled connection therewith,an inner beveled clamping-cylinder threaded at its upper end for engagement with the nut carrying the flanged expanding cylinder and provided with a lug on its circumference, which lug engages between ihe slotted edges of the outer clampingcylinder to prevent the rotation of the latter, and means for retaining in place the adjusting-cone as well as the various parts of the clamping device.

To these ends and to such others as the invention may pertain the same consists, further, in the novel construction, combination, and adaptation of parts, as will be hereinafter v more fully described, and then specifically debeing shown in section. Fig. 3 is a detail view of one of the locking-rings. Fig. 4. is a detail view of the threaded cone-bearing.

Reference now being had to the details of the drawings by letter, A designates the tightn ening-nut, which is interiorly threaded, as at Ct, and near the lower end of said nut is an annular recess A', which recess is cut in the nut below the threaded portion thereof. The outer expanding cylindrical shell B is provided with a ange B' at its upper end, as shown clearly in the sectional view of the drawings. This expanding band is tapered outward toward its lower end, andsaid flanged portion is adapted to be sprung into the recess A' in the nut, the insertion of this expanding shell in place being effected by contracting the shell and allowing it to spring back into the recess provided therefor.

The inner expanding member D is tapered toward its ends, as shown, and is externally threaded about its upper end, and its threads are adapted to engage with the threads of the tightening-nut. At any suitable location on the circumference of said expanding shoulder D, which is slitted longitudinally, as shown, is a lug D', which is adapted to extend between the ends of the outer clamping-shell to prevent rotation of said clamping-shell B. About the circumference of said shell B is a ring E, which ring has a recess E' in its inner periphery, which is adapted to engage over a lug b on the circumference of shell B to prevent the said ring from turning on the expanding shell B. On the under surface of said ring is a lug e, which is designed to engagein a hole near the margin of the threaded opening in the bearing-plate F. This bearing-plate is adapted to be screwed to the outer tubing K, and when the various parts are in place and the nut is tightened it will be noted that the inner contracting shell as the tightening-nut is turned to the right will bind against the inner tube and the latter is caused to be drawn up and in so doin gsecurely clamps the inner tube, and the outer circumference or the expanding shell B will bind against the inner wall of the outer tube, thus securely holding the parts in an adjusted relation.

Having thus described myinvention, what I claim to be new, and desire to secure by Letters Patent, is`- ICO said nut, the threaded bearing-ring with recess in its upper face, and lug integral with said ring engaging therein, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. KORTRIGIIT.

W'tnesses:

H. C. GARDINER, MAYE I-IALLAHAN. 

